CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Huixuan Zhang,Yingyang Song,Li-chao Nengzi,Jianfeng Gou,Bo Li,Xiuwen Cheng
In this paper, magnetic CuFe 2 O 4 /Bi 2 O 3 composite was successfully fabricated by a simple sol–gel combustion method with an excellent activity in the activation of persulfate (PS) for lomefloxacin (LOM) degradation. The surface morphology and structure characterizations of CuFe 2 O 4 /Bi 2 O 3 were carried out by X-ray diffraction, scanning electron microscope , transmission electron microscope, N 2 physical adsorption/desorption and vibration magnetometer measurements. The CuFe 2 O 4 /Bi 2 O 3 synthesized exhibited high catalytic activity and good stability, it could degrade 77.19% of LOM at the natural pH (6.08), more efficient than CuFe 2 O 4 . Subsequently, the catalytic performances of CuFe 2 O 4 /Bi 2 O 3 during LOM degradation were studied comprehensively under different initial conditions (catalyst dosage (0.6–1.8 g/L), PS dosage (0.6–1.8 g/L), initial pH value (3.0–11.0)). Also, the main active radicals (SO 4 − and OH) were determined by the radical scavenging experiment, which indicated that OH had a higher contribution to remove LOM than SO 4 − in CuFe 2 O 4 /Bi 2 O 3 /PS system. Moreover, the mechanism of the CuFe 2 O 4 /Bi 2 O 3 /PS system for LOM degradation was further proposed and the possible degradation pathways of LOM in CuFe 2 O 4 /Bi 2 O 3 /PS system were deduced. Furthermore, activated sludge inhibition test was performed to determine the variation of toxicity of the LOM during the degradation process. In a word, the CuFe 2 O 4 /Bi 2 O 3 catalyst has a high catalytic efficiency and a short degradation period, indicating that it was a promising catalyst towards LOM wastewater treatment , which had a great potential in environmental protection.
研究领域:
环境科学
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催化材料
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污染控制
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Rui Bai,Weifu Yan,Yong Xiao,Siqi Wang,Xiaochun Tian,Junpeng Li,Xiaofeng Xiao,Xiaoquan Lu,Feng Zhao
By modifying copper ferrite on the surface of molybdenum disulfide (MoS 2 /CuFe 2 O 4 ), an excellent catalyst that can be used for interaction with peroxymonosulfate was successfully synthesized. Owing to the large number of active sites (unsaturated sulfur) on the surface of the composite material, the electron transfer and decomposition rate of the oxidant in the reaction system were significantly enhanced. The removal ability was the strongest when the molar ratio of MoS 2 /CuFe 2 O 4 was 1.5. The removal efficiency of fluoxetine reached 97.7% within 20 min, which was higher than those obtained by pure MoS 2 (38.6%) and CuFe 2 O 4 (22.1%). The free radical test and electron paramagnetic resonance analysis indicated that sulfate radicals and hydroxyl radicals were the dominant reactive oxygen species in the reaction system. In addition, in situ Raman spectroscopy revealed that peroxymonosulfate was rapidly decomposed in the composite material system. Meanwhile, the degradation products of fluoxetine were explored by high-performance liquid chromatography-tandem mass spectrometry, and a transformation pathway based on nine intermediates was proposed, mainly involving the breaking of the carbon-oxygen bond around oxygen atom, hydroxylation, and ring-opening reactions of fluoxetine and its intermediates.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Bo He,Lixian Song,Zixuan Zhao,Weibao Liu,Yingtang Zhou,Jiangwei Shang,Xiuwen Cheng
In this study, we used the hydrothermal method and high-temperature calcination method to attach CuFe 2 O 4 to CuO for the first time. The (1 1 1) plane of CuO and (1 1 2) plane of CuFe 2 O 4 formed surface heterojunction, which acts as the interface for adsorbing PMS. Meanwhile, the most stable form of CuFe 2 O 4 /CuO, charge transfer and charge density in CuFe 2 O 4 /CuO/PMS system are proposed by combining density functional theory (DFT) and transmission electron microscope (TEM). The experimental data from electron spin resonance (ESR) determinations and active species capture demonstrated that both nonradical singlet oxygen ( 1 O 2 ) and active radicals (•OH, •SO 4 - ) participate in CIP degradation. The degradation pathways and the intermediates are proposed by Fukui index and liquid chromatography-mass spectrometry (LC-MS). Based on the T.E.S.T program (Toxicity Calculation Software), the bioaccumulation factor, acute toxicity, mutagenicity, and development toxicity of intermediates are proposed. Also, CuFe 2 O 4 /CuO demonstrated good reusability and stability. The findings within this work offered deep insights into the mechanisms of organic pollutants degradation via SR-AOP over Fe-Cu catalyst. Besides, verification of the experimental results indicated that the CIP removal of 86.67% and the mineralization efficiency of 47.17% under optimal conditions. Finally, chemical oxygen demand (COD) and fluorescence spectra in a three-dimensional excitation-emission matrix (3D EEMs) are used to characterize the potential performance of catalyst CuFe 2 O 4 /CuO-500 in medical wastewater.
研究领域:
环境科学
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材料科学
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计算化学
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DOI
高影响因子
WATER RESEARCH
·
2023
·
IF 12.8
Peng Xu,Rui Wei,Peng Wang,Xiang Li,Chunyan Yang,Tianyao Shen,Tong Zheng,Guangshan Zhang
Peroxymonosulfate (PMS) activation is a promising technology for water purification, but the removal performance of multiple pollutant matrices and the mechanism for reactive species transformation in the heterogeneous catalytic system remain ambiguous. Herein, a novel CuFe 2 O 4 /diatomite was fabricated for PMS activation to achieve efficient removal of typical pesticides. Uniform distribution of CuFe 2 O 4 on diatomite efficiently alleviated the agglomeration of CuFe 2 O 4 and increased specific surface area (57.20 m 2 g − 1 , 3.8-fold larger than CuFe 2 O 4 ). CuFe 2 O 4 /5% diatomite (5-CFD)/PMS system showed nearly 100% removal efficiency for mixed pesticide solution within 10 min (0.10 g L − 1 5-CFD and 0.40 g L − 1 PMS) and excellent anti-interference performance towards various coexisting substances (≥90% removal efficiency). The electrochemical measurements confirmed that the lower charge transfer resistance of 5-CFD significantly enhanced the electron-transfer capacity between 5-CFD and PMS, accelerating the reactions among Fe(III)/ Fe(II), Cu(II)/ Cu(I), and PMS, further generating •OH (261.3 μM), 1 O 2 (138.8 μM), SO 4 •– (11.8 μM), and O 2 •– . The O in reactive oxygen species didn't originate from dissolved oxygen (DO) but PMS, independent of the low solubility of DO and slow diffusion rate of O 2 in water. Furthermore, the production of 1 O 2 went through the process: PMS → O 2 •– → 1 O 2 , and SO 4 •– could rapidly convert into •OH. The degradation pathways and the evolution of intermediates were proposed by HPLC-QTOF-MS/MS and DFT calculations. QSAR analysis illustrated that the toxicity became lower with the reaction process. This study provides novel insights into the mechanism for pesticide degradation and active species transformation and the anti-interference capability of systems.
研究领域:
环境科学
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催化材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jiahui Wen,Yating Long,Liangdi Zhu,Liang Zeng,Xu Qin,Sirong Song,Manxia Lu,Lanqing Deng
Water pollution has become an urgent issue around the world, antibiotic residues in water result in health or environmental problems worldwide. In order to address the key issues of low catalytic efficiency, poor stability, and low visible light utilization in the current photocatalytic treatment of recalcitrant organic pollutants in water, bimetallic CuFe 2 O 4 /ABC was successfully obtained from extracted Astragalus residue and used for degradation of tetracycline under visible light. First, the bimetallic active centers (Fe and Cu) enhanced the separation of charge carriers under visible light. Then, Fe and Cu active centers activated and enhanced the production of persistent free radicals (PFRs) in biochar. Fe 2+ and Cu + in the bimetallic active centers transferred e - to O 2 to promote the formation of •O 2 − , which efficiently degraded tetracycline (94.89 %) without H 2 O 2 . Notably, the persistent free radicals (PFRs) served as intrinsic electron reservoirs. By donating electrons derived from oxidized C-C bonds to Fe/Cu centers.
研究领域:
环境科学
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材料科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Qirui Wang,Pengfei Xiao
Transition metal compounds are often used as activators in advanced oxidation processes for the treatment of refractory organics. However, the problems of inter-particle agglomeration, metal ion leaching and difficulty in recycling frequently occurred, resulting in reduced activation performance and secondary pollution. In this study, biochar (BC) was prepared from agricultural waste pine cone shells, and then a self-synthesized heterogeneous CuFe 2 O 4 -MoS 2 @BC composite was prepared for the first time, which can be used as an activator of peroxymonosulfate (PMS) for the oxidative degradation of tetracycline (TC). Analysis techniques such as XRD, SEM, BET, FT-IR, Raman, XPS, and VSM indicated that the heterogeneous catalyst with good surface properties and catalytic stability has been successfully prepared. When different concentrations of TC were treated with 0.5 g/L CuFe 2 O 4 -MoS 2 @BC and 1 mmol/L PMS, the highest degradation rate could reach 99.66 % after 60 min. Under the interference of pH, common anions and humic acid in the water environment, the degradation system can still achieve high degradation efficiency, showing excellent anti-interference ability and practical applicability. The analysis of activation mechanism reveals that the three redox ion pairs Cu + /Cu 2+ , Fe 2+ /Fe 3+ and Mo 4+ /Mo 6+ simultaneously participated in the activation of PMS, realizing multi-path electron transfer . And MoS 2 played an excellent co-catalysis role in promoting the cycling of the valence states of the ions. A total of 24 intermediate products was detected in the degradation process using LC-MS technology, and the possible degradation pathways for TC degradation were proposed. The self-synthesized CuFe 2 O 4 -MoS 2 @BC composite with high catalytic performance, stability, recyclability and low ion leaching rate has broad application prospects in the treatment of tetracycline antibiotic wastewater by activated PMS.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2023
·
IF 0
Hongchao Li,Na Yuan,Chuan Wang,Xiaofei Yan,Jieshu Qian
Transition metal oxides have been recognized as promising catalysts for the activation of peroxymonosulfate (PMS), while the underlying mechanism involved in the relevant processes remains obscure. Here, we identify the reactive species generated in the CuFe 2 O 4 /PMS process and illustrate their roles in the degradation of aromatic compounds with different substituent groups (i.e., phenol and benzoic acid). Experimental results showed that free radicals (i.e., sulfate radicals (SO 4 •− ) and hydroxyl radicals (HO • ), surface Cu(III) species, and singlet oxygen ( 1 O 2 ) coexist in the CuFe 2 O 4 /PMS process. The free radicals are mainly responsible for the oxidation of aromatic compounds with electron-withdrawing group (i.e., benzoic acid), while the surface Cu(III) is the major reactive species for the removal of aromatic compounds with electron-donating group (i.e., phenol). In addition, 1 O 2 plays a negligible role in the oxidation of both benzoic acid and phenol. This study enhances the fundamental understanding of the underlying mechanism involved in the transition metal oxides-catalyzed PMS activation process.
研究领域:
环境科学
·
化学
✓ 已验证
DOI
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ye Li,Bai-Hang Zhao,Chun Wang,Bao-Yu Zhang,Jia-Hang Liu
Supported catalysts have gradually become a research hotspot in the field of removing antibiotics from wastewater. In this study, CuFe 2 O 4 @2D-V composite catalyst was prepared by basic hydrothermal synthesis. Two-dimensional expanded vermiculite (2D-V) was prepared by high temperature and ultrasonic stripping to provide a loading platform for CuFe 2 O 4 metal ions. The characterization of CuFe 2 O 4 @2D-V was analysis by SEM, XRD and EDS. Then, levofloxacin (LVX) was chosen as representative to investigate the catalytic performance of CuFe 2 O 4 @2D-V by persulfate (PMS) activation. The optimal preparation conditions of CuFe 2 O 4 @2D-V and operating parameters of activating PMS to remove LVX were also studied. The result showed that under the condition of CuFe 2 O 4 loading 50 %, initial pH 9.2, LVX concentration 10 mg/L, catalyst concentration 0.5 g/L and PMS concentration of 0.3 mM, the removal efficiency and reaction rate of LVX could reach 89 % and 0.071 min −1 , respectively. Meanwhile, the catalyst had a good stability and high reusability. Based on the analysis of intermediate products by LC-MS, three possible degradation pathways were proposed. Quenching experiments found that non-radical O 2 1 dominated LVX degradation process. Also, the redox reaction between Cu (I)/Cu (II) and Fe (II)/Fe (III) played an important role in LVX removal process. This work might fill the gap in the application of vermiculite as a two-dimensional carrier, and provide further understanding for antibiotic wastewater treatment by metal based two-dimensional composite materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Bingyu Wang,Qiaoqiao Li,Ying Lv,Haibin Fu,Dingyi Liu,Yanfang Feng,Huifang Xie,Hongxia Qu
The CuFe 2 O 4 catalyst in advanced oxidation processes had received much attention, while the leaching metal ions and its agglomeration limited its application prospect. The conversion of waste activated sludge (WAS) into sludge-derived biochar (SBC) through pyrolysis could not only be the option of reducing the environmental burden but also converted to be the value-added environmental remediation materials. Hence, the present study prepared as a CuFe 2 O 4 /SBC heterogeneous catalyst to degrade new environmental pollutants (bisphenol S, BPS). To our best knowledge, CuFe 2 O 4 /SBC as a heterogeneous catalyst activating peroxydisulfate to degrade BPS in solution is rarely reported, and the catalytic performances and degradation mechanism of CuFe 2 O 4 /SBC need to be comprehensively investigated. The synergistic effect between CuFe 2 O 4 and SBC enhanced catalytic performances and alleviated agglomeration. The CuFe 2 O 4 /SBC was greatly ameliorated metal ions leaching, but the synthetic strategy could better optimize to further reducing Cu ion leaching. The dominant role of heterogeneous catalysis by CuFe 2 O 4 /SBC also have been elucidated. It was proposed that radical ( OH and SO 4 − ) and non-radical ( 1 O 2 ) oxidation processes worked together for BPS degradation, but surface-bound radical pathways played more crucial roles. Some intermediate products with higher toxicity may be produced due to the non-completely mineralized, thus future attention should be paid to their environmental risks. Hence, the detoxification efficiency of CuFe 2 O 4 /SBC needs to be further strengthened via improving the reaction conditions. Overall, this study provided a new strategy to simultaneously solve the problems of WAS disposal and leaching metal ions of CuFe 2 O 4 .
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2018
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IF 5.091
Jinsuo Gao,Shouchun Wu,Yanling Han,Feng Tan,Yong Shi,Mengyao Liu,Xinyong Li
Increasing the amount of surface active sites of the material may be a feasible way to improve the efficiency of the generation of Fe 2+ in the photo-Fenton process. In this work, a simple synthesis method was adopted to synthesize 3D ordered mesoporous CuFe 2 O 4 with large specific surface area by using ferric nitrate and copper nitrate as the precursor and KIT-6 as the template. The synthesized materials were characterized by nitrogen adsorption-desorption, XRD , TEM , FT-IR and UV–vis DRS . The catalytic properties of the mesoporous material were thoroughly evaluated by activating hydrogen peroxide to remove sulfonamides in near neutral water. Some of the reaction factors, such as the dose of hydrogen peroxide, catalyst usage and pollute concentration, were cautiously tested and discussed. When the catalyst dose is 0.2 g/L, the substrate concentration is 10 mg/L and the concentration of hydrogen peroxide is 10 mM, sulfamethoxazole is almost completely transformed within two hours and its mineralization level reached 31.42%. In the further study of mechanism, hydroxyl radical is proved to be the main active free radical based on EPR . Moreover, mesoporous copper ferric has good circulation, which indicates that it may have excellent application in the field of photo-Fenton.
研究领域:
环境科学
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材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhaoyang Li,Yongjie Zhao,Qing Guan,Qian Liu,Sara Khan,Leilei Zhang,Xianze Wang,Lei Chen,Xia Yang,Mingxin Huo
Photocatalytic reduction of nitrate has attracted much attention recently, however, low efficiency and difficult separation have limited its application in practice. In this study, the novel direct dual Z-scheme AgBr(Ag)/MIL-101(Cr)/CuFe 2 O 4 (AB/M/CFO) was fabricated by the hydrothermal technology combined with the photodeposition method for the first time. The AB/M/CFO exhibited the highest nitrate conversion and nitrogen selectivity (79.9% and 94.5%, respectively) compared to AgBr(Ag)/MIL-101(Cr), MIL-101(Cr) and CuFe 2 O 4 for 30 min UV-light irradiation. The dual Z-scheme of AB/M/CFO enhanced electron transfer and charge separation, which was proved by transient photocurrent responses, leading to a significant improvement in photocatalytic efficiency. Meanwhile, after four cycles, the AB/M/CFO photocatalyst also displayed a strong magnetic separation ability and excellent recycling stability. Furthermore, the excitation and electron transfer process over dual Z-scheme AB/M/CFO photocatalytic material were proposed, based on the radical trapping experiments. Our work provides a new strategy to construct dual Z-scheme MOFs-based materials that have promising applications in photocatalytic reduction of pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 37
·6207-6214
·
IF 0
Jiangnan Zheng,Zian Lin,Wei Liu,Ling Wang,Sen Zhao,Huanghao Yang,Lan Zhang
This work reports a facile ligand-free method for the rapid and highly specific separation of histidine (His)-rich proteins using CuFe2O4 magnetic nanocrystal clusters (MNCs). Monodispersed CuFe2O4 MNCs were synthesized via a simple and economical one-pot hydrothermal process. The resulting MNCs were characterized in detail. The measurements indicated that the MNCs exhibited good dispersion, high crystallinity, and superparamagnetic properties. Moreover, the obtained MNCs had a high saturation magnetization (45.1 emu g−1), which was sufficient to accomplish fast and efficient separation with an external magnetic field. The selectivity and binding capacity of CuFe2O4 MNCs were evaluated using a His-rich protein (bovine haemoglobin) and other proteins (bovine serum albumin, human serum albumin, myoglobin, lysozyme, cytochrome c and horseradish peroxidase) containing fewer surface-exposed His residues as model samples. The most distinct feature of the CuFe2O4 MNCs is the high haemoglobin binding capacity (4475 mg g−1) due to the coordination between copper(II) ions and surface-exposed histidine resides of haemoglobin. In addition, the CuFe2O4 MNCs can be successfully employed to selectively bind and remove abundant haemoglobin from human blood samples. The good results demonstrate the potential of CuFe2O4 MNCs in the separation of His-rich proteins.
研究领域:
生物化学
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材料科学
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医学
✓ 已验证
产品关联
DOI
PubMed
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